Translocation and mosaicism are two other causes of Down syndrome.

Name: Translocation and mosaicism are two other causes of Down syndrome.
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Translocation and mosaicism are two other causes of Down syndrome, in addition to trisomy 21 (the most common cause). Translocation occurs when a part of chromosome 21 breaks off and attaches to another chromosome, resulting in extra genetic material. Mosaicism occurs when some cells have an extra copy of chromosome 21 while others have the typical two copies.

Translocation and Mosaicism Are Two Other Causes of Down Syndrome